EPE Association: EPE 2007 - Subtopic 10-2 - LS: Integrated electrical machines

EPE 2007 - Subtopic 10-2 - LS: Integrated electrical machines
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 10: 'Electrical machines' > EPE 2007 - Subtopic 10-2 - LS: Integrated electrical machines

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   Design of PM integrated motor-drive system for axial pumps
By BINDER Andreas; JANJIC Boris [View]
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Abstract: The PM integrated motor-drive system for axial pumps has been designed and tested. The motor, being fed by converter, has a power of 4.5 kW at 5000/min rated speed. The propeller is integrated in the hollow shaft of the motor as a straight flow concept. After comparison of the different motor concepts for suitability as integrated pump-drives, the detailed 3-D electromagnetic and thermal calculation is presented. Design layout of the prototype and the comparison between measured and calculated values for voltage, current and temperature rise are given.

   Parameter estimation for induction motors to study the effects of voltage, frequency and slip
By HINKKANEN Marko; REPO Anna-Kaisa; ARKKIO Antero [View]
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Abstract: Parameter estimation for cage-induction machines is studied by means of 2D finite-element (FE) computations. The estimation methods are based on the time-harmonic and time-stepping FE analyses. The parameters are estimated in a wide operation range. The main purpose of the paper is to study how the steady-state and small-signal parameters vary in the case of a cage-induction machine designed for a frequency converter supply. The estimation is performed at 13 different supply frequencies. At every frequency, several flux levels are studied. Slips that provide the best efficiency are looked for and the parameters are estimated at these points. For comparison, the parameters of a typical grid-supplied cage-induction machine are also estimated at several slips and flux levels.

   Prototype of an Axial Flux Permanent Magnet Generator for Wind Energy Systems Applications
By SILVA AmÃ¢ndio; COSTA Artur; FERREIRA Angela [View]
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Abstract: Small scale wind power applications require a cost effective and mechanically simple generator in order to be a reliable energy source. The use of direct driven generators, instead of geared machines, reduces the number of drive components, which offers the opportunity to reduce costs and increases system reliability and efficiency. For such applications, characterized by low speed of rotation, the axial flux permanent magnet generator is particularly suited, since it can be designed with a large pole number and high torque density. This paper presents a double-sided axial flux permanent magnet low-speed generator, with internal rotor and slotted stators. Such a structure gives a good compromise between performance characteristics and feasibility of construction. Test results obtained from the prototype are reported.

EPE 2007 - Subtopic 10-2 - LS: Integrated electrical machines
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 10: 'Electrical machines' > EPE 2007 - Subtopic 10-2 - LS: Integrated electrical machines
	[return to parent folder]

	Design of PM integrated motor-drive system for axial pumps By BINDER Andreas; JANJIC Boris	[View] [Download]
Abstract: The PM integrated motor-drive system for axial pumps has been designed and tested. The motor, being fed by converter, has a power of 4.5 kW at 5000/min rated speed. The propeller is integrated in the hollow shaft of the motor as a straight flow concept. After comparison of the different motor concepts for suitability as integrated pump-drives, the detailed 3-D electromagnetic and thermal calculation is presented. Design layout of the prototype and the comparison between measured and calculated values for voltage, current and temperature rise are given.

	Parameter estimation for induction motors to study the effects of voltage, frequency and slip By HINKKANEN Marko; REPO Anna-Kaisa; ARKKIO Antero	[View] [Download]
Abstract: Parameter estimation for cage-induction machines is studied by means of 2D finite-element (FE) computations. The estimation methods are based on the time-harmonic and time-stepping FE analyses. The parameters are estimated in a wide operation range. The main purpose of the paper is to study how the steady-state and small-signal parameters vary in the case of a cage-induction machine designed for a frequency converter supply. The estimation is performed at 13 different supply frequencies. At every frequency, several flux levels are studied. Slips that provide the best efficiency are looked for and the parameters are estimated at these points. For comparison, the parameters of a typical grid-supplied cage-induction machine are also estimated at several slips and flux levels.

	Prototype of an Axial Flux Permanent Magnet Generator for Wind Energy Systems Applications By SILVA AmÃ¢ndio; COSTA Artur; FERREIRA Angela	[View] [Download]
Abstract: Small scale wind power applications require a cost effective and mechanically simple generator in order to be a reliable energy source. The use of direct driven generators, instead of geared machines, reduces the number of drive components, which offers the opportunity to reduce costs and increases system reliability and efficiency. For such applications, characterized by low speed of rotation, the axial flux permanent magnet generator is particularly suited, since it can be designed with a large pole number and high torque density. This paper presents a double-sided axial flux permanent magnet low-speed generator, with internal rotor and slotted stators. Such a structure gives a good compromise between performance characteristics and feasibility of construction. Test results obtained from the prototype are reported.